CN110351736B

CN110351736B - Transmission method and device for system-on-demand message request confirmation, storage medium, base station and terminal

Info

Publication number: CN110351736B
Application number: CN201810300035.5A
Authority: CN
Inventors: 高兴航; 田文强; 顾祥新
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2022-11-29
Anticipated expiration: 2038-04-04
Also published as: CN110351736A

Abstract

A transmission method and device for system-on-demand message request acknowledgement, a storage medium, a base station and a terminal are provided, the method comprises: receiving a random access lead code sent by user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access lead code; determining the other one of the on-demand system message requested by the user equipment and the beam where the user equipment resides according to the time-frequency resource adopted by the random access preamble; and transmitting a response message of the system-on-demand message request sent by the user equipment on the beam where the user equipment resides. Through the technical scheme provided by the invention, the base station can identify the system-on-demand message requested by the UE and the beam where the UE resides, so that the base station is prevented from sending corresponding response messages on all used beams, downlink resources are saved, and random access lead code resources used in the conventional random access process are saved.

Description

Transmission method and device for system-on-demand message request confirmation, storage medium, base station and terminal

Technical Field

The invention relates to a wireless communication technology, in particular to a transmission method and a transmission device for system-on-demand message request confirmation, a storage medium, a base station and a terminal.

Background

Long Term Evolution (LTE) technology and The New Radio (NR) technology support both contention random access procedure and non-contention random access procedure.

In the LTE technology, for a User Equipment (User Equipment, UE for short), as shown in fig. 1, a contention-based random access procedure includes the following steps: specifically, operation S1 is performed first, that is, the UE transmits a Random Access preamble, which is mainly used to transmit a Random Access request to an LTE base station (e.g., eNB), and simultaneously, the LTE base station can estimate a transmission delay and calibrate uplink timing accordingly, and transmit an RAR Message to the UE.

Then, operation S2 is performed, that is, the UE receives the RAR message. The RAR message is transmitted through a resource location indicated by a Physical Downlink Control Channel (PDCCH) scrambled by a Random Access Radio Network Temporary Identity (RA-RNTI). The time-frequency position of the random access lead code determines the value of the RA-RNTI, and after the UE sends the random access lead code, the corresponding PDCCH can be monitored according to the RA-RNTI in an RAR time window so as to receive RAR corresponding to the RA-RNTI.

Then, operation S3 is executed, that is, the UE transmits a Message 3 (Message 3, msg3 for short) on the uplink shared channel, where the Msg3 carries a unique UE identifier. For the UE in a connected state, the unique Identifier of the UE is a Cell Radio Network Temporary Identifier (C-RNTI); for the UE in the unconnected state, the unique identifier is a Serving-Temporary Mobile Subscriber Identity (S-TMSI) from the core network or a random number given by the core network. The unique identity of the UE is used in the conflict resolution message. This is because each UE randomly selects one Random Access preamble when initiating Random Access, which may cause a plurality of UEs to simultaneously select a time-frequency resource of the same Physical Random Access Channel (PRACH) and the same Random Access preamble, thereby causing collision.

Finally, operation S4 is performed, that is, the UE receives the conflict resolution message. The conflict resolution message carries a unique identity of the UE to designate the UE that successfully accesses the network. Other UEs that did not successfully access the network may re-initiate the random access procedure.

In a 5G NR System, a contention-based random access procedure may be employed to send an On-demand System message (On-demand System Information) request. According to the discussion result of the current 3GPP conference, it can be determined that the idle-state UE or the inactive-state UE can make the on-demand system message request based on message 1 (Msg 1-based) or based on message 3 (Msg 3-based). If the network broadcasts the random access resources (including random access preamble and random access time-frequency resources) used by the on-demand system message request through the system message, the UE can send the on-demand system message request through the Msg 1-based. Otherwise, the UE can send the system-on-demand message request through the Msg 3-based. When the UE adopts the Msg3-based on-demand system message request, the random access resource used by the UE for sending the on-demand system message request is shared with the random access resource used by the conventional random access process for sending the on-demand system message request.

Currently, a technical solution for how to send an on-demand system message request based on Msg1-based is lacking.

Disclosure of Invention

The technical problem solved by the invention is how to transmit the request of the system message on demand, so that the base station can identify the system message on demand required by the UE and also can identify the beam where the UE resides, and the base station can send the response message on the beam where the UE resides when sending the request of the system message on demand.

To solve the foregoing technical problem, an embodiment of the present invention provides a transmission method for on-demand system message request acknowledgement, where the transmission method for on-demand system message request acknowledgement includes: receiving a random access lead code sent by user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access lead code; determining the other one of the on-demand system message sent by the user equipment and the beam where the user equipment resides according to the time-frequency resource adopted by the random access lead code; and transmitting a response message of the system-on-demand message request sent by the user equipment on the beam where the user equipment resides.

Optionally, the determining, according to the random access preamble, one of an on-demand system message requested by the user equipment and a beam in which the user equipment is camped includes: and determining the on-demand system message corresponding to the random access lead code according to the preset mapping relation between the various reserved random access lead codes and the various on-demand system messages.

Optionally, the determining, according to the time-frequency resource used by the random access preamble, another one of the on-demand system message requested by the user equipment and the beam where the user equipment resides includes: and determining a beam corresponding to the time-frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time-frequency resource and each beam, wherein the beam is a beam in which the user equipment resides.

Optionally, the preset mapping relationship between each time-frequency resource and each beam is as follows: and on the configured time-frequency resources for transmitting the random access lead code, mapping each time-frequency resource to each beam one by one according to the time-frequency resource which is subjected to frequency domain multiplexing and then time domain multiplexing, or according to the sequence of time domain multiplexing and then frequency domain multiplexing.

Optionally, the preset mapping relationship between each time-frequency resource and each beam is as follows: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

Optionally, if the number of beams in the longest period requested by the on-demand system message is greater than the number of time-frequency resources, in the preset mapping relationship between each time-frequency resource and each beam, the extra beams are repeatedly mapped to at least one part of the time-frequency resources in the longest period requested by the on-demand system message; the longest period of the on-demand system message request is set in the system message configured by the base station, and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

Optionally, transmitting the response message of the on-demand system message request sent by the user equipment on the beam where the user equipment resides includes: and if a plurality of wave beams corresponding to the time-frequency resources adopted for sending the random access lead code are adopted, transmitting the response message of the on-demand system message request on the corresponding wave beams.

Optionally, the preset mapping relationship between the various reserved random access preamble codes and the various on-demand system messages is set in the on-demand system message scheduling information configuration of the base station, or set in the random access configuration of the base station.

Optionally, the determining, according to the random access preamble, one of an on-demand system message requested by the user equipment and a beam in which the user equipment resides includes: and determining to send a beam corresponding to the random access preamble according to at least the preset mapping relation between the various reserved random access preambles and each beam, wherein the beam is a beam in which the user equipment resides.

Optionally, the determining, according to at least a preset mapping relationship between each reserved random access preamble and each beam, a beam corresponding to the random access preamble to be sent includes: determining a first beam set corresponding to the random access lead code according to the preset mapping relation between various reserved random access lead codes and various beams; determining a second wave beam set corresponding to the time frequency resource used for sending the random access lead code according to the preset mapping relation between each time frequency resource and each wave beam; and determining to send a beam corresponding to the random access preamble according to the first beam set and the second beam set.

Optionally, determining, according to the time-frequency resource used by the random access preamble, another one of the on-demand system message requested by the user equipment and the beam where the user equipment resides includes: and determining the on-demand system message corresponding to the time frequency resource adopted by the random access lead code according to the preset mapping relation between each time frequency resource and each on-demand system message.

Optionally, the preset mapping relationship between each time-frequency resource and each on-demand system message is: and on the configured time-frequency resources for transmitting the random access lead codes, mapping each time-frequency resource to various system messages on demand one by one according to the sequence that the time-frequency resources are subjected to frequency domain multiplexing and then time domain multiplexing, or the sequence that the time domain multiplexing is performed firstly and then the frequency domain multiplexing is performed.

Optionally, the preset mapping relationship between each time-frequency resource and each on-demand system message is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the on-demand system messages is larger than that of the time-frequency resources, repeatedly mapping the on-demand system messages to the excessive time-frequency resources.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a method for transmitting an on-demand system message request acknowledgement, where the method for transmitting the on-demand system message request acknowledgement includes: determining a requested on-demand system message and a beam on which the user equipment resides; determining one of a random access preamble and an adopted time-frequency resource according to the on-demand system message, and determining the other of the random access preamble and the adopted time-frequency resource according to the resident beam; and sending the random access lead code by adopting the determined time-frequency resource.

Optionally, the method for transmitting an on-demand system message request acknowledgement, where determining one of a random access preamble and an adopted time-frequency resource according to the on-demand system message includes: and determining the random access lead code corresponding to the requested on-demand system message according to the preset mapping relation between the various reserved random access lead codes and the various on-demand system messages.

Optionally, the determining, according to the camped beam, the other one of the random access preamble and the adopted time-frequency resource includes: and determining the time frequency resource corresponding to the resident wave beam according to the preset mapping relation between each time frequency resource and each wave beam.

Optionally, the determining, according to the random access preamble, one of an on-demand system message requested by the user equipment and a beam in which the user equipment resides includes: and determining the time frequency resource corresponding to the on-demand system message requested by the user equipment according to the preset mapping relation between each time frequency resource and each on-demand system message.

Optionally, the determining, according to the camped beam, the other one of the random access preamble and the adopted time-frequency resource includes: and determining the random access lead code corresponding to the resident beam at least according to the preset mapping relation between various reserved random access lead codes and each beam.

Optionally, the preset mapping relationship between each time-frequency resource and each on-demand system message is as follows: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the on-demand system messages is more than that of the time-frequency resources, repeatedly mapping the on-demand system messages to more time-frequency resources.

Optionally, before determining one of a random access preamble and a time-frequency resource used according to the on-demand system message and determining the other of the random access preamble and the time-frequency resource used according to the camped beam, the request method further includes: receiving a system message configured by a base station, wherein the system message comprises a longest period of an on-demand system message request and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

To solve the foregoing technical problem, an embodiment of the present invention further provides a transmission device for on-demand system message request acknowledgement, where the transmission device for on-demand system message request acknowledgement includes: a receiving determination module, adapted to receive a random access preamble transmitted by a user equipment, and determine one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access preamble; a first determining module, adapted to determine, according to the time-frequency resource adopted by the random access preamble, the other of the on-demand system message requested by the user equipment and the beam where the user equipment resides; a first sending module, adapted to transmit a response message of an on-demand system message request sent by the user equipment on a beam on which the user equipment resides.

To solve the foregoing technical problem, an embodiment of the present invention further provides a transmission device for on-demand system message request acknowledgement, where the transmission device for on-demand system message request acknowledgement includes: a second determining module adapted to determine a requested on-demand system message and a beam on which the user equipment resides; a third determining module adapted to determine one of a random access preamble and an employed time-frequency resource according to the on-demand system message and determine the other of the random access preamble and the employed time-frequency resource according to the resident beam; and the second sending module is suitable for sending the random access lead code by adopting the determined time-frequency resource.

In order to solve the above technical problem, an embodiment of the present invention further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the transmission method for requesting acknowledgement of the on-demand system message are executed.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a base station, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the steps of the transmission method for requesting acknowledgement of the on-demand system message when executing the computer instructions.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the steps of the transmission method for requesting acknowledgement of the on-demand system message when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a transmission method for on-demand system message request confirmation, which comprises the following steps: receiving a random access lead code sent by user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access lead code; determining the other one of the on-demand system message requested by the user equipment and the beam where the user equipment resides according to the time-frequency resource adopted by the random access preamble; and transmitting a response message of the on-demand system message request sent by the user equipment on the beam where the user equipment resides. Through the technical scheme provided by the embodiment of the invention, the base station can identify the on-demand system message requested by the UE and also can identify the beam where the UE resides, so that the base station can send the on-demand system message requested by the UE on the beam where the UE resides. Therefore, the base station can be prevented from sending the on-demand system message on all used beams, downlink transmission resources can be saved, random access lead code resources can be saved, more random access lead codes are reserved for the random access of the UE, and the random access collision probability of the UE can be reduced.

Further, the determining, according to the time-frequency resource used by the random access preamble, the other of the on-demand system message requested by the user equipment and the beam in which the user equipment resides includes: and determining the wave beam corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each wave beam. By the technical scheme provided by the embodiment of the invention, the beam where the UE resides can be determined based on the preset mapping relation between each time-frequency resource and each beam, so that the base station is prevented from sending the system-on-demand message requested by the UE on all the used beams, and downlink transmission resources are greatly saved.

Drawings

Fig. 1 is a schematic signaling interaction diagram of a contention-based random access method in LTE technology;

FIG. 2 is a schematic diagram illustrating a mapping relationship between beams and time-frequency resources in the current 5G technology;

fig. 3 is a schematic diagram of a mapping relationship between a beam, PRACH time-frequency resources, and a random access preamble in the current 5G technology;

fig. 4 is a flowchart illustrating a transmission method for on-demand system message request acknowledgement according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a mapping between beams and time-frequency resources under a specific configuration in the 5G technology;

fig. 6 is a schematic diagram of allocation of random access preamble codes for on-demand system message request and for conventional random access according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of mapping between another beam and time-frequency resource under a specific configuration in the 5G technology;

fig. 8 is a schematic diagram of allocation of a random access preamble for an on-demand system message request and for a conventional random access according to an embodiment of the present invention;

FIG. 9 is a flowchart illustrating a transmission method for on-demand system message request acknowledgement according to another embodiment of the present invention;

FIG. 10 is a block diagram of an apparatus for transmitting an on-demand system message request acknowledgement according to an embodiment of the present invention;

FIG. 11 is a block diagram illustrating an alternative embodiment of an apparatus for transmitting an on-demand system message request acknowledgement;

fig. 12 is a schematic diagram illustrating an exemplary signaling interaction between a request and a response of an on-demand system message according to an embodiment of the present invention.

Detailed Description

As mentioned in the background, the prior art has not discussed the technical solution for transmitting the on-demand system message request based on the Msg1-based, and at present, the technical solution for transmitting the on-demand system message request based on the Msg1-based is still lacking.

Through careful study, the inventors of the present application find that, in a conventional random access process of a 5G system, a mapping relationship between different beams and a time-frequency resource (e.g., a random access channel opportunity (RACH occupancy, abbreviated as RO)) is shown in fig. 2. As can be seen with reference to fig. 2, one beam may be mapped to one time-frequency resource (e.g., RO) or may be mapped to multiple time-frequency resources; or multiple beams are mapped to the same time-frequency resource. The beams correspond to Synchronization Signal Blocks (SSBs) one to one, and different beams may be represented by different SSBs.

In specific implementation, the mapping manner of the beam and the time-frequency resource depends on the configuration of the base station. If the parameter SSB-per-rach-occasion is less than or equal to 1, it indicates that one beam is mapped to 1 or more ROs, and the number of ROs is equal to the reciprocal of the indicated value of the parameter SSB-per-rach-occasion; if the parameter SSB-per-rach-occasion is greater than 1, indicating that multiple beams are mapped onto one RO, the number of beams is equal to the value indicated by the parameter SSB-per-rach-occasion. Wherein, the value of the parameter SSB-per-rach-occasion can be 1/8, 1/4, 1/2, 1, 2, 4, 8 or 16.

Fig. 3 is a schematic diagram of a mapping relationship between a beam, PRACH time-frequency resources, and a random access preamble in the 5G technology. Referring to fig. 3, a basic principle of mapping a beam and a PRACH time-frequency resource is to map a first beam in a beam set to a first RO, and then continue to map the beam according to an order of first frequency domain multiplexing and then time domain multiplexing of the RO, that is, sequentially map the beams according to an arrangement order of the ROs.

When one beam is mapped to one RO or to a plurality of ROs, a beam on which a UE camps corresponding to a random access preamble transmitted on the RO can be identified through the ROs. When multiple beams are mapped to the same RO, the base station identifies the beams by random access preamble division. There are 64 random access preambles in the 5G NR, and any one random access preamble may be mapped to each RO. If multiple beams are mapped into one RO, the available random access preamble codes corresponding to the respective beams are equally divided among all the available random access preamble codes.

If multiple beams are mapped to one PRACH time-frequency resource to send a random access preamble according to the prior art, the following problems will arise:

(1) If the random access preamble mapped by the system-on-demand message allocated by the base station is available for the UEs on all beams, that is, the system-on-demand message needs to be mapped with the random access preambles one by one, in this case, the base station cannot identify the best beam where the user of each random access preamble transmitted by the system-on-demand message request resides through the prior art, and the base station needs to send the response message of the system-on-demand message request on a plurality of transmission beams, which greatly wastes downlink transmission resources;

(2) If the base station configures enough random access lead codes for each beam for the system message request on demand, that is, the system message on demand and the random access lead codes are mapped one by one, a large number of random access lead codes are required to be reserved for the system message request on demand process, and the number of the random access lead codes used for the conventional random access process on each beam is reduced, which results in the probability of user access collision.

Therefore, an embodiment of the present invention provides a transmission method for requesting acknowledgement of an on-demand system message, where the transmission method includes: receiving a random access lead code sent by user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access lead code; determining the other one of the on-demand system message requested by the user equipment and the beam where the user equipment resides according to the time-frequency resource adopted by the random access lead code; and transmitting a response message of the on-demand system message request sent by the user equipment on the beam where the user equipment resides.

Through the technical scheme provided by the embodiment of the invention, the base station can identify the on-demand system message requested by the UE and also can identify the beam where the UE resides, so that the base station can send the on-demand system message requested by the UE on the beam where the UE resides. The method and the device can avoid the base station from sending the on-demand system message on all used beams, are favorable for saving downlink transmission resources, can save random access lead code resources, reserve more random access lead codes for the random access of the UE, and are favorable for reducing the random access collision probability of the UE.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 4 is a flowchart illustrating a transmission method for on-demand system message request acknowledgement according to an embodiment of the present invention. The transmission method of the on-demand system message request acknowledgement (hereinafter referred to as transmission method for simplicity) may be used on the network side, and may be performed by a base station on the network side, for example. Referring to fig. 4, the transmission method may include the steps of:

step S401: receiving a random access lead code sent by user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access lead code;

step S402: determining the other one of the on-demand system message requested by the user equipment and the beam where the user equipment resides according to the time-frequency resource adopted by the random access lead code;

step S403: and transmitting a response message of the system-on-demand message request sent by the user equipment on the beam where the user equipment resides.

Specifically, if the idle state UE or the inactive state UE receives the random access resource broadcasted by the base station through the system message for transmitting the on-demand system message request, the UE may send the on-demand system message request (e.g., the random access preamble) based on the message 1 (Msg 1-based). The random access resources include random access preamble resources and time-frequency resources (e.g., RO) that the base station requests reservation for the on-demand system message.

Once the base station determines the random access preamble corresponding to the requested on-demand system message, the base station may learn the time-frequency resource corresponding to the transmission of the random access preamble. If the random access preamble is one of the random access preambles that the base station requests reservation for the UE to transmit the on-demand system message, the base station may determine that the random access preamble is for requesting the on-demand system message.

Then, the base station may first determine the on-demand system message requested by the UE according to the determined random access preamble and the determined time-frequency resource, and then determine the beam in which the UE resides. Or, the base station may first determine the beam where the UE resides according to the determined random access preamble and the determined time-frequency resource, and then determine the on-demand system message requested by the UE. It should be noted that the beam where the UE resides refers to one of multiple beams used by the network base station side for transmitting data, and the UE may transmit an on-demand system message request by using the PRACH time-frequency resource and the random access preamble resource associated with the residing beam.

Specifically, in step S401, the base station may receive and parse the random access preamble transmitted by the UE. Once the random access preamble sent by the UE is determined, the base station may determine the time-frequency resource corresponding to the random access preamble according to a correspondence between the random access preamble and the time-frequency resource used for random access. Under the condition that the random access preamble and the time-frequency resource are determined, the base station may identify one of the on-demand system message requested by the UE and the beam in which the UE resides according to a preset mapping relationship between each time-frequency resource and each beam, or a preset mapping relationship between each time-frequency resource and each on-demand system message.

In a specific implementation, if the base station and the UE know preset mapping relationships between various reserved random access preambles and various on-demand system messages before receiving an on-demand system message request message sent by the UE, or the base station notifies the UE of the preset mapping relationships between various on-demand system messages and various reserved random access preambles through a configuration message (e.g., a radio control resource configuration message), after determining a random access preamble sent by the UE, the base station may determine the on-demand system message requested by the UE according to the preset mapping relationships between various random access preambles and various on-demand system messages. For example, the reserved random access preamble is mapped with various on-demand system messages one by one, and after the base station parses the random access preamble sent by the UE, the base station may determine the on-demand system message corresponding to the random access preamble according to the preset mapping relationship.

Further, the base station and the UE may obtain the preset mapping relationship between each time-frequency resource and each beam in advance, or the base station notifies the UE of the preset mapping relationship between each time-frequency resource and each beam through a configuration message (e.g., a radio control resource configuration message). After determining the random access preamble sent by the UE, the base station may determine the time-frequency resource used by the random access preamble according to the correspondence between the reserved random access preamble and each time-frequency resource. Then, the base station may calculate the beam where the UE resides according to a preset mapping relationship between each time-frequency resource and each beam.

Or, if the base station and the UE know the preset mapping relationship between each time-frequency resource and each on-demand system message before receiving the on-demand system message request message sent by the UE, or the base station notifies the UE of the mapping relationship between each time-frequency resource and each on-demand system message through a configuration message, the base station may determine the time-frequency resource of the random access preamble according to the corresponding relationship between each reserved random access preamble and each time-frequency resource after determining the random access preamble sent by the UE. Then, the base station may calculate the on-demand system message requested by the UE according to a preset mapping relationship between each time-frequency resource and each on-demand system message.

Further, if the base station and the UE know mapping relationships between various reserved random access preambles and respective beams before receiving the on-demand system message request message sent by the UE, or the base station notifies the UE of preset mapping relationships between various reserved random access preambles and respective beams through a configuration message, the base station may determine a beam where the UE resides according to the mapping relationships between the respective reserved random access preambles and the respective beams after determining the random access preamble sent by the UE.

Those skilled in the art understand that, since the number of random access preamble codes requested for transmitting the on-demand system message may be relatively small, the base station may exclude only a part of beams according to the preset mapping relationship between each reserved random access preamble code and each beam, and may not accurately obtain the beam on which the UE resides. Nevertheless, the base station may exclude a part of the beams based on the preset mapping relationship. Since part of the beams are excluded and the beams for transmitting the response message become fewer, once the base station transmits the response message requested by the on-demand system message, part of the downlink resources can be saved.

Preferably, the base station may calculate the beam where the UE resides according to a preset mapping relationship between each time-frequency resource and each beam, and by combining the preset mapping relationships between various reserved random access preambles and each beam. Specifically, the base station may first determine a first beam set corresponding to a random access preamble according to a preset mapping relationship between various reserved random access preambles and each beam (for example, the mapping relationship between a random access preamble and each beam in the prior art); then, according to the preset mapping relation between each time-frequency resource and each wave beam, determining a second wave beam set corresponding to the time-frequency resource adopted by the random access lead code; finally, the beams corresponding to the random access preamble are determined by combining the first beam set and the second beam set, for example, the beams in the intersection of the first beam set and the second beam set are determined as the beams corresponding to the random access preamble. And combining the preset mapping relation between each time-frequency resource and each wave beam and the preset mapping relation between each random access lead code and each wave beam, the base station is easy to identify the wave beam where the UE sending the on-demand system message request resides, so that the resource overhead is saved.

Further, the base station and the UE may establish a preset mapping relationship between each time-frequency resource and each beam in advance, or establish a preset mapping relationship between each time-frequency resource and each on-demand system message in advance. Based on each preset mapping relationship, the base station can deduce the on-demand system message and the resident beam requested by the UE.

Specifically, the preset mapping relationship between each time-frequency resource and each beam may be defined as follows (for example, referred to as a default mode 1): and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources.

Specifically, firstly, a random access preamble code used for carrying out an on-demand system message request, a time-frequency resource used for transmitting the random access preamble code and a beam actually working are determined according to configuration information of a base station; and secondly, mapping each time-frequency resource (namely RO) with each beam according to the sequence that the time-frequency resources are firstly subjected to frequency domain multiplexing and then subjected to time domain multiplexing and then subjected to frequency domain multiplexing.

Or, the preset mapping relationship between each time-frequency resource and each beam may be defined according to the following manner (for example, referred to as a default manner 2): based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

Specifically, firstly, a random access preamble code used for carrying out an on-demand system message request, a time-frequency resource used for transmitting the random access preamble code and a beam actually working are determined according to configuration information of a base station; secondly, based on the mapping relationship between the beams and the RO in the prior art, each time frequency resource and the beam are mapped one by one on the mapped RO time frequency resource according to the mapping sequence (for example, the actually transmitted beam sequence) of each beam mapped to the time frequency resource.

Or, the preset mapping relationship between each time-frequency resource and each beam may be defined as follows (for example, referred to as a default mode 3): and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of time frequency resource time domain multiplexing and frequency domain multiplexing.

Specifically, firstly, determining a time-frequency resource and an actually working beam for transmitting a random access preamble according to configuration information of a base station; and secondly, mapping each RO and each beam according to the sequence of time domain multiplexing and frequency domain multiplexing of the RO time-frequency resources until all the time-frequency resources are mapped.

The preset mapping relationship between each time-frequency resource and each beam redefines the preset mapping relationship between each time-frequency resource and each beam when the on-demand system message requests to be sent. When the UE sends the on-demand system message request according to the preset mapping relation, the base station can calculate the beam where the UE resides based on the corresponding relation between the random access lead code and the time frequency resource and the preset mapping relation between each time frequency resource and each beam, so that the corresponding response message can be sent only on the beam where the UE resides, and the downlink resource overhead can be greatly saved.

It should be noted that the network may also display and indicate the preset mapping relationship between each time-frequency resource and each beam through the configuration information of the base station. After the preset mapping relationship between each time-frequency resource and each beam is determined, the UE may send an on-demand system message request on the resident beam according to the preset mapping relationship, and the base station may calculate the resident beam of the UE and the requested on-demand system message according to the preset mapping relationship.

Further, the preset mapping relationship between each time-frequency resource and each on-demand system message may be defined as follows (for example, referred to as a default mode 4): and on the configured time frequency resources for transmitting the random access lead code, mapping the corresponding time frequency resources to various system-on-demand messages one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources or the sequence of first time domain multiplexing and then frequency domain multiplexing.

Specifically, firstly, determining a time-frequency resource and an actually working beam for transmitting a random access preamble according to configuration information of a base station; secondly, mapping each time-frequency resource (namely RO) and various system-on-demand messages one by one according to the sequence of the RO time-frequency resource which is firstly subjected to frequency domain multiplexing and then subjected to time domain multiplexing or is firstly subjected to time domain multiplexing and then subjected to frequency domain multiplexing.

Alternatively, the preset mapping relationship between each time-frequency resource and each on-demand system message may be defined in the following manner (for example, referred to as a default manner 5): based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the on-demand system messages is more than that of the time-frequency resources, repeatedly mapping the on-demand system messages to more time-frequency resources.

Specifically, firstly, determining time-frequency resources for transmitting a random access preamble and transmission beams which actually work according to configuration information of a base station; secondly, based on the mapping relationship between the beams and the RO in the prior art, each time-frequency resource and the on-demand system information are mapped on the mapped RO time-frequency resource according to the mapping sequence (for example, the size sequence of the actual working beam identifier) of each beam mapped to the time-frequency resource, and the on-demand system information and the time-frequency resource are mapped in the next round after all the on-demand system information and the time-frequency resource are mapped until all the time-frequency resources are mapped.

It should be noted that, under the preset mapping relationship between each time-frequency resource and each on-demand system message, only one random access preamble may be reserved for each beam mapped to each time-frequency resource, and once the base station receives the reserved preamble, it may be determined that the random access performed by the user is for requesting the base station to transmit the on-demand system message.

Further, after the preset mapping relationship between each time-frequency resource and each on-demand system message is determined, in order to enable the base station to determine the beam where the UE resides, the mapping relationship between the reserved random access preamble and the beam when the on-demand system message requests to be sent may also be determined based on the mapping relationship between each beam and each random access preamble in the prior art.

Furthermore, the preset mapping relationship between each time-frequency resource and each beam can be redefined, so that the base station can finally determine the beam where the UE resides by combining the mapping relationship between each beam and each random access preamble and the preset mapping relationship between each time-frequency resource and each beam, so that the base station can only send the corresponding response message on the beam where the UE resides, and the downlink resource overhead can be saved. It should be noted that the base station may also display, through the configuration information, a preset mapping relationship indicating each time-frequency resource and each on-demand system message.

Further, the base station can also add various reserved random access lead codes and various preset mapping relations of the on-demand system messages in the configuration of the scheduling information of the on-demand system messages; alternatively, the base station may indicate the respective random access preambles in the random access configuration for the on-demand system message request.

Further, the base station may send a system message carrying the longest period of the on-demand system message request to the UE to inform the UE of the longest random access channel time period for the Msg1-based on-demand system message request. Then, when the UE is ready to send the on-demand system message request, the UE determines the time-frequency resource occupied by the random access preamble and the requested on-demand system message only within the longest period of the on-demand system message request according to the preset mapping relationship of the various resources provided by the embodiment of the present invention.

If the number of the ROs in the longest period of the on-demand system message request is smaller than the number of the beams, that is, if the number of the beams is larger than the number of the ROs, in the preset mapping relationship between each time-frequency resource and each beam, the extra beams repeatedly map the preset mapping relationship defined according to the embodiment of the present invention to the time-frequency resource in the longest period of the on-demand system message request.

As a non-limiting embodiment, in the preset mapping relationship between each time-frequency resource and each beam, if the on-demand system message request longest period cannot satisfy one-to-one mapping between all beams and ROs, the remaining beams will be repeatedly mapped in the on-demand system message request longest period until the mapping of all beams is completed. As a further non-limiting example, if the on-demand system message requests that the mapping of all beams transmitting the on-demand system message with ROs cannot be satisfied for the longest period, the remaining beams may also repeat the mapping of the on-demand system message request for the longest period until the mapping of all beams is completed.

Since the number of beams that are added out may not coincide with the number of ROs, there are cases where the number of beams mapped on each RO is different. Those skilled in the art will appreciate that once the mapping is repeated, a preset mapping relationship exists between a single RO and a plurality of beams due to the repeated mapping. At this time, if the UE sends an on-demand system message request using the RO mapped with the plurality of beams, the base station may not accurately identify the beam on which the UE resides, and the base station may send corresponding response messages on all identified beams.

For example, the base station transmits data using 8 beams, identified by the synchronization signal blocks SSB1, SSB2, SSB3, SSB4, SSB5, SSB6, SSB7, and SSB 8. Referring to fig. 5, the base station has two configurations, configuration 1 and configuration 2. When configuring the time-frequency domain resources of the PRACH, the frequency domain resource multiplexing number of configuration 1 is 4, and the frequency domain resource multiplexing number of configuration 2 is 2; the number of time domain resources in the two configuration periods is 6; the number of beams mapped on each RO is 2; the on-demand system message includes 3 kinds, identified by OSI1, OSI2 and OSI3, which the base station can inform the UE of using the parameter configuration in the prior art.

Based on the above configuration scenario, as a non-limiting example, if the random access preamble reserved by the base station is mapped one-to-one with the on-demand system message, each random access preamble is applicable to all beams on all ROs. Referring to fig. 6, the communication system has 3 kinds of on-demand system messages, and the mapping relationship with the random access preamble code is as follows: OSI1 is transmitted with random access preamble 61, OSI2 is transmitted with random access preamble 62, OSI3 is transmitted with random access preamble 63.

When the preset mapping relationship between each time-frequency resource and each beam is the default mode 1, the preset mapping relationship defined by the default mode 1 is combined with the configuration 1 and fig. 6 in fig. 5, and the relationship between the beam and the RO when various on-demand system messages are requested is as follows:

(1) A UE camping on SSB1 may send a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO1, RO9, RO 17; (2) The UE camping on the SSB2 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO2, RO10, RO 18; (3) The UE camping on the SSB3 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO3, RO11, RO 19; (4) The UE camping on the SSB4 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on the RO4, the RO12, the RO 20; and so on until SS8, which will not be described in detail.

When the preset mapping relationship between each time-frequency resource and each beam is the default mode 2, referring to configuration 1 in fig. 5, and referring to fig. 6, the relation between the beam and the RO when various on-demand system messages are requested through the preset mapping relationship defined in the default mode 2 is as follows:

(1) A UE camping on SSB1 may send a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO1, RO9, RO 17; (2) The UE camping on the SSB2 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO5, RO13, RO 21; (3) The UE camping on the SSB3 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on the RO2, the RO10, the RO 18; (4) The UE camping on the SSB4 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on the RO6, the RO14, the RO 22; and so on until SS8, which will not be described in detail.

When the preset mapping relationship between each time-frequency resource and each beam adopts the default mode 2, referring to the configuration 2 in fig. 5, and referring to fig. 6, the preset mapping relationship defined by the default mode 1, the relationship between the beam and the RO when various on-demand system messages are requested is as follows:

(1) A UE camping on SSB1 may send a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO1, RO 9; (2) A UE camping on the SSB2 sends a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO2, RO 10; (3) A UE camping on the SSB3 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO3, RO 11; (4) The UE camping on the SSB4 transmits a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on the RO4, the RO 12; and the rest can be analogized until SS8, and the description is omitted.

When the preset mapping relationship between each time-frequency resource and each beam adopts the default mode 2, referring to the configuration 2 in fig. 5, and referring to fig. 6, the relation between the beam and the RO when various on-demand system messages are requested through the preset mapping relationship defined in the default mode 2 is as follows:

(1) A UE camping on SSB1 may send a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO1, RO 9; (2) A UE camping on SSB2 sends a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO 5; (3) The UE camping on the SSB3 sends a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO2, RO 10; (4) The UE camping on SSB4 sends a random access preamble 61 or a random access preamble 62 or a random access preamble 63 on RO 6; and so on until SS8, which will not be described in detail.

Further, as shown in fig. 7, if the number of beams configured by the base station is 16, in the random access channel time period, each beam (e.g., the illustrated SSB) cannot be mapped with each RO one by one, and more random access channel time periods may be required. If the base station indicates that the maximum period of the Msg1-based on-demand system message request is 1 random access channel time period through the system information, the remaining SSBs can complete mapping by adopting a repeated mapping method.

Taking configuration 1 in fig. 5 as an example, and referring to fig. 6, based on the preset mapping relationship defined in default mode 1, the relationship between the beam and the RO when the on-demand system message is requested is as follows:

(1) A UE residing on SSB1 sends a random access preamble 61, a random access preamble 62 and a random access preamble 63 on RO 1; (2) A UE residing on SSB2 sends a random access preamble 61, a random access preamble 62 and a random access preamble 63 on RO 2; (3) The UE camping on the SSB3 transmits a random access preamble 61, a random access preamble 62, and a random access preamble 63 on the RO 3; 823060, 8230; (12) A UE camping on the SSB12 transmits a random access preamble 61, a random access preamble 62, and a random access preamble 63 on the RO 12; (13) The UE camping on the SSB13 sends a random access preamble 61, a random access preamble 62, a random access preamble 63 on the RO 1; (14) The UE camping on the SSB14 sends a random access preamble 61, a random access preamble 62, a random access preamble 63 on RO 2; (15) A UE camping on the SSB15 transmits a random access preamble 61, a random access preamble 62, and a random access preamble 63 on the RO 3; (16) The UE camping on the SSB16 transmits the random access preamble 61, the random access preamble 62, and the random access preamble 63 on the RO 4.

At this time, if there is a UE request on-demand system message on the SSB1 or SSB13, the base station cannot determine whether the beam on which the UE camps is the SSB1 or the SSB13. In this case, the base station may send corresponding on-demand system messages on SSB1 and SSB13. Those skilled in the art will appreciate that the specific implementation may vary from one embodiment to another and will not be described further herein.

As a variation, still taking configuration 1 as an example, the base station may display to notify the UE to indicate the relationship of the beam and RO for transmitting the on-demand system message request, i.e. the base station may designate ROX among RO1 to RO24 for the UE camping on the SSBY to send the random access preamble 61, the random access preamble 62 or the random access preamble 63, where X applies to 24 and y applies to 1 to 8.

Based on the configuration scenario shown in fig. 5, as another non-limiting embodiment, when the preset mapping relationship between each time-frequency resource and each on-demand system message adopts the default mode 4, the on-demand system information request may be sent according to the existing preset mapping relationship between the beam and the time-frequency resource. In conjunction with the reserved random access preamble and the time-frequency resources, the base station may identify a beam on which the UE that sent the random access preamble may camp. As shown in fig. 8, the reserved random access preamble codes are the random access preamble code 31 and the random access preamble code 63. The preset mapping relationship between each reserved random access preamble and each beam may be: the random access preamble 31 may send an on-demand system information request on beam SSB1, SSB3, SSB5, or SSB 7; the random access preamble 63 may send an on-demand system information request on SSB2, SSB4, SSB6, or SSB 8.

With reference to fig. 5 and 8, in configuration 1, the preset mapping relationship defined by the default mode 4, the relationship between the various on-demand system messages and the respective ROs is as follows:

(1) RO1 is used for UEs on SSBs 1 to SSB8 to transmit random access preamble 31 or random access preamble 63 request on-demand system message OSI1; (2) RO2 is used for UEs on SSBs 1 to SSB8 to transmit random access preamble 31 or random access preamble 63 request on-demand system message OSI2; (3) RO3 is used for UEs on SSBs 1 to 8 to transmit either the random access preamble 31 or the random access preamble 63 requesting the on-demand system message OSI3. And then, completing the mapping of the RO and the on-demand system message according to a repeated mapping mode.

In this case, when the various reserved random access preambles and the preset mapping relations of the various beams are the mapping relations in fig. 8, if the base station receives the UE transmission preamble 31 for requesting OSI1 or OSI2 or OSI3, the base station needs to send an on-demand system information request response message on SSB1, SSB3, SSB5, SSB 7; if the base station receives the UE transmission random access preamble 63 for requesting OSI1 or OSI2 or OSI3, the base station may send the response message of the on-demand system information request only on 4 beams (e.g., SSB2, SSB4, SSB6, and SSB 8), which is beneficial for saving downlink resources.

As a variation, with reference to configuration 1 shown in fig. 5 and the preset mapping relationship between each time-frequency resource and each on-demand system message in default mode 4 (for example, according to the sequence of time-frequency resource frequency-domain multiplexing first and time-domain multiplexing second), and with reference to the preset mapping relationship between each reserved random access preamble and each beam in fig. 8, the preset mapping relationship between each time-frequency resource and each beam may be set as follows:

(1) The set of time-frequency resources { RO1, RO2, RO3} or the set of time-frequency resources { RO13, RO14, RO15} is used for UEs on SSB1 to SSB2 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (2) The set of time-frequency resources { RO4, RO5, RO6} or the set of time-frequency resources { RO16, RO17, RO18} is used for UE transmissions on SSB3 to SSB4 to request OSI1, OSI2 or OSI3 for random access preamble 31 or 63, respectively; (3) RO7, RO8, RO9 or RO19, RO20, RO21 for UE transmission on SSB5 to SSB6 random access preamble 31 or random access preamble 63 requests OSI1, OSI2 or OSI3, respectively; (4) The set of time-frequency resources { RO10, RO11, RO12} or the set of time-frequency resources { RO16, R20, R24} is used for UE transmissions on SSBs 7 to SSBs 8 to request OSI1, OSI2 or OSI3, respectively, for random access preamble 31 or random access preamble 63.

When the UE requests an on-demand system message based on the Msg1-based request, after the base station obtains a random access preamble through analysis, a first beam set corresponding to the random access preamble can be determined according to the preset mapping relation between the random access preamble and each beam in the prior art; determining a second beam set corresponding to the time frequency resource adopted by the random access lead code based on the preset mapping relation between each time frequency resource and each beam; and combining the first beam set and the second beam set, the base station can finally accurately calculate the beam where the UE resides.

As another variation, with reference to the configuration 1 and the preset mapping relationship between each time-frequency resource and each on-demand system message in the default mode 5 shown in fig. 5, and with reference to the preset mapping relationship between each reserved random access preamble and each beam in fig. 8, the preset mapping relationship between each time-frequency resource and each beam may be set as follows:

(1) The set of time-frequency resources { RO1, RO5, RO9} or the set of time-frequency resources { RO13, R17, R21} is used for UEs on SSB1 to SSB2 to transmit a random access preamble 31 or a random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (2) The set of time-frequency resources { RO2, RO6, R10} or the set of time-frequency resources { RO14, R18, R22} is used for UEs on SSB3 to SSB4 to transmit a random access preamble 31 or 63 requesting OSI1, OSI2 or OSI3, respectively; (3) The set of time-frequency resources { RO3, RO7, R11} or the set of time-frequency resources { RO15, R19, R23} is used for UEs on SSB5 to SSB6 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (4) The set of time-frequency resources { RO4, RO8, R12} or the set of time-frequency resources { RO16, R20, R24} is used for UE transmissions on SSBs 7 to SSB8 to request OSI1, OSI2 or OSI3, respectively, for random access preamble 31 or 63. Those skilled in the art understand that, based on the preset mapping relationships provided by the variation, the base station can accurately calculate the beam where the UE resides. The camping beam refers to one of a plurality of beams for transmitting data by the base station side when the UE transmits the random access preamble.

As another variation, with reference to the preset mapping relationship between each time-frequency resource and each on-demand system message in configuration 2 and default mode 4 shown in fig. 5, and with reference to the preset mapping relationship between each reserved random access preamble and each beam in fig. 8, the preset mapping relationship between each time-frequency resource and each beam may be set as follows:

(1) The set of time-frequency resources { RO1, RO2, RO3} is used for UEs on SSB1 to SSB2 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (2) The set of time-frequency resources { RO4, RO5, RO6} is used for the transmission of random access preamble 31 or random access preamble 63 by UEs on SSB3 to SSB4 to request OSI1, OSI2 or OSI3, respectively; (3) The set of time-frequency resources { RO7, RO8, RO9} is used for UEs on SSB5 to SSB6 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (4) The set of time-frequency resources { RO10, RO11, RO12} or the set of time-frequency resources { RO22, RO23, RO24} is used for UE transmissions on SSBs 7 to SSBs 8 to request OSI1, OSI2 or OSI3, respectively, for random access preamble 31 or random access preamble 63. Those skilled in the art understand that, based on the preset mapping relationships provided by the variation, the base station can accurately calculate the beam where the UE resides.

(1) The set of time-frequency resources { RO1, RO5, RO9} is used for UEs on SSB1 to SSB2 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (2) The set of time-frequency resources { RO2, RO6, RO10} is used for UEs on SSB3 to SSB4 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (3) The set of time-frequency resources { RO3, RO7, RO11} is used for UEs on SSB5 to SSB6 to transmit random access preamble 31 or random access preamble 63 requesting OSI1, OSI2 or OSI3, respectively; (4) The set of time-frequency resources { RO4, RO8, RO12} is used for UE transmissions on SSB7 to SSB8 for random access preamble 31 or random access preamble 63 to request OSI1, OSI2 or OSI3, respectively. Those skilled in the art understand that, based on the preset mapping relationships provided by the variation, the base station can accurately calculate the beam where the UE resides.

As still another variation, taking configuration 1 as an example, the base station indicates, by way of display, the relationship between the beam and the RO transmitting the on-demand system information request. For example, the base station may arbitrarily designate 3 ROs among the ROs 1 to 24 for the UE camping on the SSBY to transmit the random access preamble 31 or the random access preamble 63 to identify OSI1, OSI2, or OSI3, respectively, where Y applies to 1 to 8.

In step S402, the base station may determine, according to the time-frequency resource for transmitting the random access preamble, the other one of the on-demand system message requested by the UE and the beam where the UE camps. For example, if the on-demand system message requested by the UE has been determined according to the random access preamble in step S401, the beam where the UE resides is determined according to the time-frequency resource adopted by the random access preamble in step S402; or, if the beam on which the UE camps is determined according to the random access preamble in step S401, the on-demand system message requested by the UE is determined according to the time-frequency resource adopted by the random access preamble in step S402.

Specifically, if the base station determines the on-demand system message requested by the UE based on the preset mapping relationship between various on-demand system messages and various reserved random access preambles, the base station needs to determine a beam in which the UE resides. More specifically, after determining the random access preamble and the time-frequency resource sent by the UE, the base station may determine a beam in which the UE resides according to a preset mapping relationship between each time-frequency resource and each beam.

Or, if the base station determines the on-demand system message requested by the UE based on the preset mapping relationship between each time-frequency resource and each on-demand system message, the base station needs to determine the beam where the UE resides. More specifically, after determining the random access preambles transmitted by the UE, the base station may determine the beam on which the UE camps according to a preset mapping relationship between each random access preamble and a transmission beam.

Or, if the base station determines the time frequency resource according to the random access lead code, the system message of the random access lead code is determined according to the preset mapping relation between each time frequency resource and each on-demand system message. Then, the base station may calculate the beam where the UE resides by combining the preset mapping relationship between each random access preamble and each beam according to the preset mapping relationship between each time-frequency resource and each beam.

Or, if the base station determines the camping beam of the UE, the on-demand system message requested by the UE may be determined according to the preset mapping relationship between various on-demand system messages and various random access preambles.

Or, if the base station determines the camping beam of the UE, the time-frequency resource of the random access preamble may be determined according to the preset mapping relationship between the random access preamble and the time-frequency resource. Then, the base station may determine the on-demand system message requested by the UE according to a preset mapping relationship between each time-frequency resource and each on-demand system message.

Those skilled in the art will understand that the manner of determining the beam on which the on-demand system message and the UE camp in steps S402 and S401 are similar, and the two are complementary in specific implementation principle and logic. Therefore, for each preset mapping relationship in the step S402, reference may be made to the related description of the step S401, which is not described herein again.

In step S403, the base station may transmit a response message of the on-demand system message request sent by the UE to the UE on a beam on which the UE resides. The response message may be a random access response message of a random access procedure.

Further, if the base station determines that there are multiple beams according to each preset mapping relationship (for example, the time-frequency resource adopted by the random access preamble corresponds to multiple beams), and it is difficult for the base station to further identify the beam where the UE resides, the on-demand system message may be sent on each determined beam, so that the UE may receive the requested on-demand system message. For example, in the preset mapping relationship between each time-frequency resource and each beam, there is a repeated mapping between a certain time-frequency resource (e.g., RO 1) and a beam (SSB 1, SSB 10), and when the random access preamble analyzed by the base station happens to be transmitted on the time-frequency resource RO1, the second beam set will include the beam SSB1 and the beam SSB2, and at this time, the base station will send the requested on-demand system message on the beam SSB1 and the beam SSB 2.

Fig. 9 is a flowchart illustrating a transmission method for system-on-demand message request acknowledgement according to another embodiment of the present invention, where the method may be applied to a UE side, for example, executed by a UE. Referring to fig. 9, the requesting method may include the steps of:

step S501: determining a requested on-demand system message and a beam on which the user equipment resides;

step S502: determining one of a random access preamble and an adopted time-frequency resource according to the on-demand system message, and determining the other of the random access preamble and the adopted time-frequency resource according to the resident beam;

step S503: and sending the random access lead code by adopting the determined time-frequency resource.

Specifically, if the UE in an idle state or an inactive state receives a random access resource broadcasted by a system message and used for transmitting an on-demand system message request from a network side base station, the UE may request the on-demand system message in an Msg1-based manner.

In step S501, if the UE needs the on-demand system message, the on-demand system message that needs to be requested and a beam used for transmitting the on-demand system message, that is, a camped beam, are determined.

In step S502, in each preset mapping relationship previously achieved by the base station and the UE, the UE first determines a random access preamble used by the on-demand system message according to the on-demand system message, and then determines a time-frequency resource used by the on-demand system message according to the resident beam; or, according to the on-demand system message, the UE first determines a time-frequency resource used by the on-demand system message, and then determines a random access preamble used according to the resident beam. It should be noted that, if the UE receives the system message configured by the network base station before determining the random access preamble and the time-frequency resource to be used, and the system message includes the longest period of the on-demand system message request, which is used to indicate the longest random access channel time period of the on-demand system message request based on the message 1, the UE needs to determine the random access preamble and the time-frequency resource to be used in the longest period of the on-demand system message request.

Specifically, the UE may determine the random access preamble corresponding to the requested on-demand system message according to a preset mapping relationship between various reserved random access preambles and various on-demand system messages; and then, determining the time frequency resource corresponding to the resident wave beam according to the preset mapping relation between each time frequency resource and each wave beam.

Or, the UE may determine, according to a preset mapping relationship between each time-frequency resource and each on-demand system message, a time-frequency resource corresponding to the on-demand system message requested by the user equipment; and then, determining the random access preamble corresponding to the resident beam at least according to the preset mapping relation between various reserved random access preambles and each beam.

Preferably, the UE may further determine the random access preamble and the time-frequency resource to be used in combination with the preset mapping relationship between the various reserved random access preambles and the various beams and the preset mapping relationship between the various time-frequency resources and the various beams.

In step S503, the UE transmits the random access preamble on the determined time-frequency resource to request the on-demand system message.

The implementation principle of the transmission method for the on-demand system message request acknowledgement at the UE side and the transmission method for the on-demand system message request acknowledgement at the network side are complementary, and the steps S501 to S503 may be regarded as the execution steps corresponding to the steps S401 to S403 in the embodiment shown in fig. 4, and reference may be made to the relevant description of fig. 4 to fig. 8 together, which is not repeated here.

In this way, according to the technical solution provided by the embodiment of the present invention, the preset mapping relationship between each time-frequency resource and each beam may be redefined, or the mapping relationship between each time-frequency resource and each on-demand system message may be redefined, and the on-demand system message request may be transmitted based on message 1 by using the common time-frequency resource for random access. Through the preset mapping relation provided by the embodiment of the invention, the base station can send the system-on-demand message requested by the UE on the beam where the UE resides, and the base station is prevented from sending response messages on all used beams, so that not only can downlink transmission resources be saved, but also random access lead code resources used in the conventional random access process can be saved, the UE can select random access lead codes from more random access lead codes, and the random access collision probability of the user can be reduced.

Fig. 10 is a schematic structural diagram of a transmission apparatus for on-demand system message request acknowledgement according to an embodiment of the present invention. Referring to fig. 10, the transmission apparatus 6 for on-demand system message request acknowledgement may be used on the network side to implement the transmission method technical solution for on-demand system message request acknowledgement shown in fig. 4.

In a specific implementation, the transmission device 6 for requesting acknowledgement by the on-demand system message may include: a reception determination module 61, a first determination module 62 and a first transmission module 63.

Specifically, the receiving and determining module 61 is adapted to receive a random access preamble sent by a user equipment, and determine one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access preamble; the first determining module 62 is adapted to determine, according to the time-frequency resource adopted by the random access preamble, the other one of the on-demand system message requested by the user equipment and the beam where the user equipment resides; the first sending module 63 is adapted to transmit a response message of the on-demand system message request sent by the user equipment on the beam on which the user equipment resides.

Further, the reception determination module 61 may include a first determination sub-module 611. Specifically, the first determining sub-module 611 is adapted to determine the on-demand system message corresponding to the random access preamble according to a preset mapping relationship between various reserved random access preambles and various on-demand system messages.

Further, the first determination module 62 includes a second determination submodule 621. Specifically, the second determining sub-module 621 is adapted to determine, according to a preset mapping relationship between each time-frequency resource and each beam, a beam corresponding to the time-frequency resource used for sending the random access preamble, where the beam is a beam where the user equipment resides.

Further, if the number of the beams in the longest period requested by the on-demand system message is greater than the number of the time-frequency resources, the extra beams in the preset mapping relationship between each time-frequency resource and each beam are repeatedly mapped to at least one part of the time-frequency resources in the longest period requested by the on-demand system message; the longest period of the on-demand system message request is set in the system message configured by the base station, and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

Further, the first transmission module 63 may include a transmission sub-module 631. In a specific implementation, if there are a plurality of beams corresponding to the time-frequency resource used for sending the random access preamble, the sending sub-module 631 is adapted to send a response message of the on-demand system message request on the corresponding plurality of beams.

Further, the preset mapping relationship between various reserved random access preamble codes and various on-demand system messages is set in the on-demand system message scheduling information configuration of the base station, or in the random access configuration of the base station.

Further, the reception determination module 61 may include a third determination submodule 612. Specifically, the third determining sub-module 612 is adapted to determine, according to at least various preset mapping relationships between the reserved random access preamble and each beam, a beam corresponding to the random access preamble, where the beam is a beam in which the user equipment resides.

Further, the third determining sub-module may include a first determining unit 6121, the second determining unit 6122, and the third determining unit 6123.

In specific implementation, the first determining unit 6121 is adapted to determine, according to preset mapping relationships between various reserved random access preambles and various beams, a first beam set corresponding to sending the random access preamble; the second determining unit 6122 is adapted to determine, according to the preset mapping relationship between each time-frequency resource and each beam, a second beam set corresponding to the time-frequency resource used for sending the random access preamble; the third determining unit 6123 is adapted to determine, according to the first beam set and the second beam set, a beam corresponding to the random access preamble to be transmitted.

Further, the first determination module 62 may include a fourth determination submodule 622. The fourth determining sub-module 622 is adapted to determine, according to the preset mapping relationship between each time-frequency resource and each on-demand system message, an on-demand system message corresponding to the time-frequency resource used for sending the random access preamble.

For more details of the operation principle and the operation mode of the transmission device 6 requesting acknowledgement by the on-demand system message, reference may be made to the related descriptions in fig. 4 to fig. 8, and details are not repeated here.

Fig. 11 is a schematic structural diagram of another transmission apparatus for requesting acknowledgement by an on-demand system message according to an embodiment of the present invention. Referring to fig. 11, the transmission apparatus 7 for requesting acknowledgement of on-demand system message may be used at the user equipment side to implement the technical solution of the transmission method for requesting acknowledgement of on-demand system message shown in fig. 9.

In particular, the transmission device 7 of the on-demand system message request acknowledgement may comprise a second determining module 71, a third determining module 73 and a second sending module 74.

More specifically, the second determination module 71 is adapted to determine the requested on-demand system message and the beam on which the user equipment is camping; the third determining module 73 is adapted to determine one of a random access preamble and a time-frequency resource to be used according to the on-demand system message and to determine the other of the random access preamble and the time-frequency resource to be used according to the camped beam; the second sending module 73 is adapted to send the random access preamble using the determined time-frequency resources.

Further, the third determination module 73 may include a fifth determination sub-module 731. The fifth determining submodule 731 is adapted to determine a random access preamble corresponding to the requested on-demand system message according to a preset mapping relationship between various reserved random access preambles and various on-demand system messages.

Further, the third determination module 73 may include a sixth determination sub-module 732. Specifically, the sixth determining sub-module 732 is adapted to determine, according to the preset mapping relationship between each time-frequency resource and each beam, the time-frequency resource corresponding to the resident beam.

Further, the third determination module includes a seventh determination sub-module 733. Specifically, the seventh determining sub-module 733 is adapted to determine, according to a preset mapping relationship between each time-frequency resource and each on-demand system message, a time-frequency resource corresponding to the on-demand system message requested by the user equipment.

Further, the third determining module 73 may include an eighth determining sub-module 734. Specifically, the eighth determining submodule 734 is adapted to determine the random access preamble corresponding to the camped beam at least according to the various reserved random access preambles and the preset mapping relationship of each beam.

Further, the on-demand system message request acknowledgement transmission device 7 may further include a receiving module 72. The receiving module 72 is adapted to receive a system message configured by the base station, the system message including a longest period of an on-demand system message request indicating a longest random access channel time period of an on-demand system message request based on message 1, before determining one of a random access preamble and an employed time frequency resource from the on-demand system message and determining the other of the random access preamble and the employed time frequency resource from the camped beam.

For more details of the operation principle and the operation mode of the transmission device 7 requesting acknowledgement by the on-demand system message, reference may be made to the related description in fig. 9, and details are not repeated here.

Referring to fig. 12, in particular, in a typical application scenario, a UE sends an on-demand system message request through a random access preamble.

As one non-limiting example, the reserved random access preamble for transmitting the on-demand system message is mapped one-to-one with the on-demand system message.

Specifically, the user equipment 1 performs operation s1, that is, the user equipment 1 first determines the random access preamble based on the requested on-demand system message, and then determines the time-frequency resource corresponding to the beam where the user equipment resides according to the preset mapping relationship between each time-frequency resource and each beam.

Further, operation s2 is performed, that is, the user equipment 1 sends the random access preamble to the base station 2 on the network side.

Further, after successfully decoding the random access preamble sent by the user equipment 1, the base station 2 on the network side performs operation s3, that is, obtains the on-demand system message corresponding to the random access preamble according to the preset mapping relationship between various reserved random access preambles and various on-demand system messages. Then, the base station 2 obtains a beam corresponding to the time-frequency resource adopted by the random access preamble, that is, a beam where the user equipment 1 resides, according to the preset mapping relationship between each time-frequency resource and each beam.

Further, the base station 2 performs operation s4, that is, transmits the response message of the on-demand system message request on the determined beam (that is, the beam on which the user equipment 1 resides), that is, the on-demand system message requested by the user equipment 1.

As yet another non-limiting example, the time-frequency resources (i.e., ROs) used to send the on-demand system messages are mapped one-to-one with the on-demand system messages.

Specifically, the user equipment 1 executes operation s1, that is, the user equipment 1 may determine the time frequency resource corresponding to the resident beam according to the preset mapping relationship between each time frequency resource and each beam. And then determining the random access preamble corresponding to the resident beam according to the preset mapping relation between the various reserved random access preambles and each beam, and if the number of the random access preambles for transmitting the on-demand system message is more than 1, randomly selecting one of the random access preambles.

Further, operation s2 is performed, that is, the user equipment 1 transmits the random access preamble to the base station 2 on the network side.

Further, after successfully decoding the random access preamble sent by the user equipment 1, the base station 2 on the network side performs operation s3, that is, determines the on-demand system message corresponding to the time-frequency resource used by the random access preamble according to the preset mapping relationship between each time-frequency resource and each on-demand system message.

And then, obtaining the on-demand system message corresponding to the random access preamble according to the preset mapping relation between various reserved random access preambles and various on-demand system messages. As a variation, the base station 2 may further determine, according to the preset mapping relationship between each reserved random access preamble and each beam and the preset mapping relationship between each time-frequency resource and each beam, a beam corresponding to the time-frequency resource used by the random access preamble, that is, a beam where the user equipment 1 resides.

It should be noted that, when the base station 2 determines the beam where the user equipment 1 resides, if there is a situation that multiple beams are repeatedly mapped to the same RO in the preset mapping relationship between each time-frequency resource and each beam, the base station 2 obtains two or more beams, and at this time, when operation s4 is executed, the base station 2 needs to send the response message of the on-demand system message request on the corresponding multiple beams.

For more contents of the working principles and working modes of the user equipment 1 and the base station 2 in the application scenario shown in fig. 12, reference may be made to the related descriptions in fig. 4 to fig. 9 together, and details are not repeated here.

Further, the embodiment of the present invention further discloses a storage medium, on which a computer instruction is stored, and when the computer instruction runs, the technical solution of the transmission method for on-demand system message request acknowledgement in the embodiments shown in fig. 4 to fig. 9 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The computer readable storage medium may include ROM, RAM, magnetic or optical disks, and the like.

Further, an embodiment of the present invention further discloses a base station, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and the processor executes the transmission method technical solution for on-demand system message request acknowledgement in the embodiments shown in fig. 4 to 8 when executing the computer instruction. Specifically, the base station may be an NR gNB.

Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and the processor executes the transmission method technical solution for on-demand system message request acknowledgement in the embodiment shown in fig. 9 when executing the computer instruction. Specifically, the terminal may be a user equipment, and in particular, the user equipment may be a user equipment suitable for 5G NR communication.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting an on-demand system message request acknowledgement, comprising:

receiving a random access preamble transmitted by a user equipment, and determining one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access preamble, including: determining an on-demand system message corresponding to a random access lead code according to a preset mapping relation between various reserved random access lead codes and various on-demand system messages;

determining, according to the time-frequency resource used by the random access preamble, the other of the on-demand system message requested by the user equipment and the beam in which the user equipment resides, including: determining a wave beam corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each wave beam, wherein the wave beam is a wave beam resided by user equipment; mapping each time-frequency resource and each wave beam one by one;

transmitting a response message of an on-demand system message request sent by the user equipment on a beam on which the user equipment resides;

if the number of the time domain resources in the longest period requested by the on-demand system message is smaller than the number of the beams, the extra beams are repeatedly mapped to at least one part of the time domain resources in the longest period requested by the on-demand system message in the preset mapping relation between each time frequency resource and each beam; the longest period of the on-demand system message request is set in the system message configured by the base station, and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

2. The transmission method according to claim 1, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources or the sequence of first time domain multiplexing and then frequency domain multiplexing.

3. The transmission method according to claim 1, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

4. The transmission method according to claim 1, wherein said transmitting the response message of the on-demand system message request sent by the user equipment on the beam on which the user equipment resides comprises:

and if the wave beams corresponding to the time-frequency resources adopted for sending the random access lead code are multiple, transmitting the response message of the on-demand system message request on the corresponding wave beams.

5. The transmission method according to claim 1, wherein the predetermined mapping relationship between the various reserved random access preamble codes and the various on-demand system messages is set in an on-demand system message scheduling information configuration of the base station or in a random access configuration of the base station.

6. The transmission method of claim 1, wherein the determining one of the user equipment requested on-demand system message and the user equipment camped beam according to the random access preamble comprises:

and determining to send a beam corresponding to the random access preamble according to at least the preset mapping relation between the various reserved random access preambles and each beam, wherein the beam is a beam in which the user equipment resides.

7. The transmission method according to claim 6, wherein the determining, according to at least the preset mapping relationship between the various reserved random access preambles and the respective beams, a beam corresponding to the random access preamble to be transmitted comprises:

determining a first beam set corresponding to the random access lead code according to the preset mapping relation between various reserved random access lead codes and various beams;

determining a second wave beam set corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each wave beam;

and determining to send a beam corresponding to the random access preamble according to the first beam set and the second beam set.

8. The method according to claim 6 or 7, wherein the determining the other of the user equipment requested on-demand system message and the user equipment camped beam according to the time-frequency resource used by the random access preamble comprises:

and determining the on-demand system message corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each on-demand system message.

9. The transmission method according to claim 8, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to various system-on-demand messages one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing or the sequence of first time domain multiplexing and then frequency domain multiplexing of the time frequency resources.

10. The transmission method according to claim 8, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the time-frequency resources is greater than that of the on-demand system messages, repeatedly mapping the on-demand system messages to the excessive time-frequency resources.

11. A method for transmitting an on-demand system message request acknowledgement, comprising:

determining a requested on-demand system message and a beam on which the user equipment resides;

determining one of a random access preamble and an adopted time-frequency resource according to the on-demand system message, and determining the other of the random access preamble and the adopted time-frequency resource according to the resident beam; the determining one of a random access preamble and an adopted time-frequency resource according to the on-demand system message comprises: determining time frequency resources corresponding to the on-demand system messages requested by the user equipment according to the preset mapping relation between the time frequency resources and the on-demand system messages; the preset mapping relation between each time-frequency resource and each on-demand system message is as follows: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the time-frequency resources is greater than that of the on-demand system messages, repeatedly mapping the on-demand system messages to the excessive time-frequency resources;

and sending the random access lead code by adopting the determined time-frequency resource.

12. The method of claim 11, wherein determining one of a random access preamble and time-frequency resources to use based on the on-demand system message comprises:

and determining the random access lead code corresponding to the requested on-demand system message according to the preset mapping relation between various reserved random access lead codes and various on-demand system messages.

13. The method of claim 12, wherein the determining the other of the random access preamble and the adopted time-frequency resource according to the camped beam comprises:

and determining the time frequency resource corresponding to the resident wave beam according to the preset mapping relation between each time frequency resource and each wave beam.

14. The transmission method according to claim 13, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources or the sequence of first time domain multiplexing and then frequency domain multiplexing.

15. The transmission method according to claim 13, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

16. The method of claim 11, wherein the determining the other of the random access preamble and the adopted time-frequency resource according to the camped beam comprises:

and determining the random access lead code corresponding to the resident beam at least according to the preset mapping relation between various reserved random access lead codes and each beam.

17. The transmission method according to claim 11, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: and on the configured time-frequency resources for transmitting the random access lead codes, mapping each time-frequency resource to various system messages on demand one by one according to the sequence of first frequency-domain multiplexing and then time-domain multiplexing of the time-frequency resources or the sequence of first time-domain multiplexing and then frequency-domain multiplexing.

18. The transmission method according to any of claims 11 to 17, further comprising, before determining one of a random access preamble and a time-frequency resource to be used from the on-demand system message and determining the other of the random access preamble and the time-frequency resource to be used from the camped beam:

receiving a system message configured by a base station, wherein the system message comprises a longest period of an on-demand system message request and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

19. An apparatus for transmitting an on-demand system message request acknowledgement, comprising:

a receiving determination module, adapted to receive a random access preamble sent by a user equipment, and determine one of an on-demand system message requested by the user equipment and a beam where the user equipment resides according to the random access preamble, including: determining an on-demand system message corresponding to a random access lead code according to a preset mapping relation between various reserved random access lead codes and various on-demand system messages;

a first determining module, adapted to determine, according to a time-frequency resource adopted by the random access preamble, the other of the on-demand system message requested by the user equipment and the beam where the user equipment resides, including: determining a wave beam corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each wave beam, wherein the wave beam is a wave beam resided by user equipment; mapping each time-frequency resource and each wave beam one by one;

a first sending module, adapted to transmit a response message of an on-demand system message request sent by the user equipment on a beam on which the user equipment resides;

if the number of the time frequency resources in the longest period requested by the on-demand system message is smaller than the number of the beams, the extra beams are repeatedly mapped to at least one part of the time frequency resources in the longest period requested by the on-demand system message in the preset mapping relation between each time frequency resource and each beam; the longest period of the on-demand system message request is set in the system message configured by the base station, and is used for indicating the longest random access channel time period of the on-demand system message request based on the message 1.

20. The transmission apparatus of claim 19, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources or the sequence of first time domain multiplexing and then frequency domain multiplexing.

21. The transmission apparatus of claim 19, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

22. The transmission apparatus of claim 19, wherein the first sending module comprises:

and the sending sub-module is suitable for transmitting the response message of the on-demand system message request on a plurality of corresponding wave beams if the wave beams corresponding to the time-frequency resources adopted for sending the random access lead code are a plurality.

23. The transmission apparatus according to claim 19, wherein the predetermined mapping relationship between the various reserved random access preambles and the various on-demand system messages is set in an on-demand system message scheduling information configuration of the base station or in a random access configuration of the base station.

24. The transmission apparatus of claim 19, wherein the reception determining module comprises:

and the third determining submodule is suitable for determining a beam corresponding to the random access preamble at least according to the preset mapping relation between the various reserved random access preambles and each beam, wherein the beam is a beam in which the user equipment resides.

25. The transmission apparatus of claim 24, wherein the third determination submodule comprises:

the first determining unit is suitable for determining a first beam set corresponding to the random access lead code according to various preset mapping relations between the reserved random access lead code and each beam;

the second determining unit is suitable for determining a second beam set corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each beam;

a third determining unit, adapted to determine a beam corresponding to the random access preamble according to the first beam set and the second beam set.

26. Transmission apparatus according to claim 24 or 25, wherein said first determining means comprises:

and the fourth determining submodule is suitable for determining the on-demand system message corresponding to the time frequency resource adopted for sending the random access lead code according to the preset mapping relation between each time frequency resource and each on-demand system message.

27. The transmission apparatus as claimed in claim 26, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to various system-on-demand messages one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing or the sequence of first time domain multiplexing and then frequency domain multiplexing of the time frequency resources.

28. The transmission apparatus as claimed in claim 26, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the time-frequency resources is greater than that of the on-demand system messages, repeatedly mapping the on-demand system messages to the excessive time-frequency resources.

29. An apparatus for transmitting an on-demand system message request acknowledgement, comprising:

a second determining module adapted to determine a requested on-demand system message and a beam on which the user equipment resides;

a third determining module adapted to determine one of a random access preamble and an employed time-frequency resource according to the on-demand system message and determine the other of the random access preamble and the employed time-frequency resource according to the resident beam; the determining one of the random access preamble and the adopted time-frequency resource according to the on-demand system message comprises: determining time frequency resources corresponding to the on-demand system messages requested by the user equipment according to the preset mapping relation between the time frequency resources and the on-demand system messages; the preset mapping relationship between each time-frequency resource and each on-demand system message is as follows: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each on-demand system message one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource, and if the number of the time-frequency resources is greater than that of the on-demand system messages, repeatedly mapping the on-demand system messages to the excessive time-frequency resources;

and the second sending module is suitable for sending the random access lead code by adopting the determined time-frequency resource.

30. The transmission apparatus of claim 29, wherein the third determining module comprises:

and the fifth determining submodule is suitable for determining the random access lead code corresponding to the requested on-demand system message according to the preset mapping relation between various reserved random access lead codes and various on-demand system messages.

31. The transmission apparatus of claim 30, wherein the third determining module further comprises:

and the sixth determining submodule is suitable for determining the time frequency resource corresponding to the resident wave beam according to the preset mapping relation between each time frequency resource and each wave beam.

32. The transmission apparatus of claim 31, wherein the predetermined mapping relationship between each time-frequency resource and each beam is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to each wave beam one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing of the time frequency resources or the sequence of first time domain multiplexing and then frequency domain multiplexing.

33. The transmission apparatus of claim 31, wherein the predetermined mapping relationship between each time-frequency resource and each beam is as follows: based on the mapping relation between each time-frequency resource and each wave beam in the random access process, mapping each corresponding time-frequency resource to each wave beam one by one according to the mapping sequence of each wave beam mapped to the same time-frequency resource.

34. The transmission apparatus of claim 29, wherein the third determining module further comprises:

and the eighth determining submodule is suitable for determining the random access preamble corresponding to the resident beam at least according to the preset mapping relation between various reserved random access preambles and each beam.

35. The transmission apparatus as claimed in claim 34, wherein the predetermined mapping relationship between each time-frequency resource and each on-demand system message is: and on the configured time frequency resources for transmitting the random access lead code, mapping each time frequency resource to various system-on-demand messages one by one according to the sequence of first frequency domain multiplexing and then time domain multiplexing or the sequence of first time domain multiplexing and then frequency domain multiplexing of the time frequency resources.

36. The transmission apparatus as claimed in any one of claims 29 to 35, further comprising:

a receiving module adapted to receive a system message configured by a base station before determining one of a random access preamble and a time-frequency resource to be used according to the on-demand system message and determining the other of the random access preamble and the time-frequency resource to be used according to the resident beam, the system message including a longest period of an on-demand system message request for indicating a longest random access channel time period of the on-demand system message request based on message 1.

37. A storage medium having stored thereon computer instructions which, when executed by a processor, perform the steps of the method of transmission of an on-demand system message request acknowledgement as claimed in any one of claims 1 to 18.

38. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the method of transmission of on demand system message request acknowledgements of any of claims 1 to 10.

39. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the method of transmission of on demand system message request acknowledgements of any of claims 11 to 18.